Enhancement of Poly(vinyl ester) Solubility in Supercritical CO2 by Partial Fluorination: The Key Role of Polymer–Polymer Interactions

An enhancement of poly(vinyl ester) solubility in supercritical carbon dioxide (sc-CO2) can be achieved by decreasing the strength of the polymer–polymer interactions. To demonstrate this, a library of statistical copolymers of vinyl acetate and vinyl trifluoroacetate was synthesized by RAFT/MADIX p...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2012-07, Vol.134 (29), p.11920-11923
Main Authors: Girard, Etienne, Tassaing, Thierry, Camy, Séverine, Condoret, Jean-Stéphane, Marty, Jean-Daniel, Destarac, Mathias
Format: Article
Language:English
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Summary:An enhancement of poly(vinyl ester) solubility in supercritical carbon dioxide (sc-CO2) can be achieved by decreasing the strength of the polymer–polymer interactions. To demonstrate this, a library of statistical copolymers of vinyl acetate and vinyl trifluoroacetate was synthesized by RAFT/MADIX polymerization with varying compositions at a given number-average molecular weight. These copolymers exhibited unprecedentedly low cloud-point pressures in sc-CO2 at 40 °C compared with previously reported poly(vinyl esters). Surface tension measurements combined with a computational approach evidenced the prominent role played by polymer–polymer interactions.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja304585d